A Log of Coding Solutions
by Webhead
In WordPress, when a query does not need paging and you only want a limited amount of results, like the last 5 posts, set the ‘no_found_rows’ parameter to true. This prevents WordPress from doing additional work in counting the total matched rows, thus speeding up your query.
This is already built into get_posts, but not WP_Query.
Example:
$last_5_query = WP_Query( array( ‘no_found_rows’=> true, ‘posts_per_page’=>5 ) );
by Webhead
In WordPress 4.4 images are displayed with the srcset attribute. This attribute allows the browser to select alternative images for best viewing. Sometimes though this may not be wanted as the image being displayed is the only image you want to show for all users.
To not have any srcset images, use the following:
add_filter( ‘wp_calculate_image_srcset_meta’, ‘__return_null’ );
For other filters new to WordPress 4.4, you can visit the blog post:
One user had a problem with the images in the srcset not having the https protocol and causing security warnings. This stack overflow post resolves that:
http://wordpress.stackexchange.com/questions/211375/how-do-i-disable-responsive-images-in-wp-4-4
by Webhead
When using parameters from the URL, it should always be sanitized before using it in your javascript.
Using jQuery you can easily do:
var safeString = $(“<span></span>”).text(unsafeString).html();
Using plain javascript:
var entityMap = {
"&": "&",
"<": "<",
">": ">",
'"': '"',
"'": ''',
"/": '/'
};
function escapeHtml(string) {
return String(string).replace(/[&<>"'\/]/g, function (s) {
return entityMap[s];
});
}
The stackoverflow discussion can be found here: http://stackoverflow.com/questions/24816/escaping-html-strings-with-jquery
by Webhead
Having a left sidebar move under the content in a responsive design needs a bit more thinking. You can’t just do float left width 100% or display block and let the sidebar fall to the next line.
When the browser width is narrow, use display:table-footer-group for the sidebar, display:table-header-group for the content, and display:table for the parent container.
See more:
http://www.iandevlin.com/blog/2013/06/css/css-stacking-with-display-table
by Webhead
Got a website with noone visits or simply a website that is private but still need WP-Cron to be run? no problem, you have 2 easy options.
1) Setup a free account with set https://www.setcronjob.com ( i like them better because they enable email notifications on the free account). Create a cron job to visit wp-cron.php on your domain.
2) set up a scheduled task or cron job on your computer. Mac OS X and Windows PC. Problem with this though is your computer needs to be on with internet access, and if you ever buy another computer (and don’t turn your current one on) this job will never run:
https://developer.wordpress.org/plugins/cron/hooking-into-the-system-task-scheduler/
by Webhead
Non-hierarchical post types are like regular posts which normally do not have a menu_order attribute. Hierarchical post type are like pages which allows a parent/child and is normally ordered by the menu_order attribute. What if you have a custom post type that shouldn’t have a parent/child, but you still want to order it by something other than the post date? This code does the trick on the admin side.